Display device with different positional relationships between emitting elements and filters

ABSTRACT

The display device includes the first light-emitting element, a second light-emitting element, a first color filter through which light from the first light-emitting element passes, and a second color filter through which the light from the second light-emitting element passes. The relative positional relationship between the center of the first light-emitting element and the center of the first color filter is different from the relative positional relationship between the center of the second light-emitting element and the center of the second color filter.

TECHNICAL FIELD

The present invention relates to a display device and an electronicapparatus.

BACKGROUND ART

Recently, as a virtual image display device which is capable of formingand observing a virtual image such as a head mounted display, a headmounted display which is a type of guiding video light from a displayelement to eyes of an observer has been proposed. In such a the virtualimage display device, as disclosed in PTL 1, a see-through opticalsystem overlapping the video light and external light is adopted.

CITATION LIST Patent Literature

-   PTL 1: JP-A-2013-200553

SUMMARY OF INVENTION Technical Problem

However, in the virtual image display device disclosed in PTL 1, thereis a problem in that both improving an image quality of the displayimage and reducing the size of an electronic apparatus such as the headmounted display are not easy to realize at the same time. In the virtualimage display device of the related art, when enhancing resolution bymaking the display image bright, the display device becomes larger. Inother words, in the related art, when the display device is applied tothe electronic apparatus, there is a problem in that lightening theweight and reducing the size of the display device while displaying highresolution image is not easy to realize to the degree that a user doesnot feel uncomfortable.

Solution to Problem

Accordingly, it is an object of the present invention to solve at leasta part of the above described problems and the invention can be realizedin the following forms or application examples.

Application Example 1

According to this application example, there is provided a displaydevice including a first light-emitting element, a second light-emittingelement, a first color filter through which light from the firstlight-emitting element passes, and a second color filter through whichthe light from the second light-emitting element passes, in which arelative positional relationship between a center of the firstlight-emitting element and a center of the first color filter in planeview is different from a relative positional relationship between acenter of the second light-emitting element and a center of the secondcolor filter in plane view.

In this case, since the color filter is arranged corresponding to anoptical axis from the light-emitting element, a size of thelight-emitting element is maintained at the certain degree and an angleof view can be widened. Accordingly, both improving an image quality ofthe display image and reducing the size of an electronic apparatus suchas a head mounted display can be realized at the same time.

Application Example 2

In the display device according to Application Example 1, it ispreferable that the first light-emitting element, the first colorfilter, the second light-emitting element, and the second color filterare arranged in the display region, an optical axis of the firstlight-emitting element is inclined to a center side of the displayregion from a normal line with respect to the first light-emittingelement, and the center of the first color filter in plane view isdeviated to the center side of the display region further than thecenter of the first light-emitting element in plane view.

In the display device of the electronic apparatus such as the headmounted display including a light collection optical system, except acenter portion of the display region, the optical axis from thelight-emitting element is inclined to the center side of the displayregion. Accordingly, in this configuration, since the color filter isarranged to be deviated to the center side with respect to thelight-emitting element, a size of the light-emitting element ismaintained at the certain degree and the angle of view can be widened.That is, both reducing the size of the electronic apparatus includingthe light collection optical system such as the head mounted display andimproving a quality of the image displayed on the electronic apparatuscan be realized at the same time.

Application Example 3

In the display device according to Application Example 2, it ispreferable that the second light-emitting element and the second colorfilter are arranged inside further than the first light-emitting elementand the first color filter in the display region, and when a deviationamount of the center of the first light-emitting element and the centerof the first color filter in plane view is a first deviation amount, anda deviation amount of the center of the second light-emitting elementand the center of the second color filter in plane view is a seconddeviation amount, the second deviation amount is smaller than the firstdeviation amount.

In the display device of the electronic apparatus including the lightcollection optical system such as the head mounted display, aninclination of the optical axis from the light-emitting element is largeoutside of the display region. In this configuration, since thedeviation amount between the light-emitting element and the color filteris adjusted corresponding to the position of the light-emitting elementin the display region, a size of the light-emitting element ismaintained at the certain degree and a angle of view can be widened.That is, both reducing the size of the electronic apparatus includingthe light collection optical system such as the head mounted display andimproving a quality of the image displayed on the electronic apparatuscan be realized at the same time.

Application Example 4

In the display device according to Application Example 3, it ispreferable that a separation portion that separates the color filter isfurther included and a difference between the first deviation amount andthe second deviation amount is made by a width of the separation portionarranged between the first color filter and the second color filter.

In this configuration, the positional relationship between thelight-emitting element and the color filter can be easily adjusted bychanging only the width of the separation portion.

Application Example 5

In the display device according to Application Example 3, it ispreferable that the color filter includes a red color filter, a greencolor filter, and a blue color filter, and the difference between thefirst deviation amount and the second deviation amount is made by thewidth of the separation portion which is arranged between the firstcolor filter and the second color filter and separates the red colorfilter and the blue color filter.

Humans have high visibility with respect to a green color. Accordingly,in this configuration, since the difference of the deviation amount ismade avoiding the green color filter having high visibility, apossibility that the user notices an existence of the separation portionwhich generates the difference can be suppressed.

Application Example 6

In the display device according to Application Example 4 or 5, it ispreferable that the light-emitting element and the color filter arearranged in the display region in a matrix shape, and positions in a rowdirection of the separate portions which generate the difference betweenthe first deviation amount and the second deviation amount are differentfrom each other in a first row and a second row adjacent to the firstrow.

In this configuration, since the separation portions having a differentwidth do not make one column, the possibility that the user notices anexistence of the separation portion can be suppressed.

Application Example 7

In the display device according to Application Example 3, it ispreferable that the difference between the first deviation amount andthe second deviation amount is made by a width of the other color filterarranged between the first color filter and the second color filter.

In this configuration, the positional relationship between thelight-emitting element and the color filter can be easily adjusted bychanging only a width of the color filter.

Application Example 8

In the display device according to Application Example 7, it ispreferable that the color filter includes the red color filter, thegreen color filter, and the blue color filter, and the other colorfilter is the blue color filter.

The humans have low visibility with respect to a blue color.Accordingly, in this configuration, since the difference of thedeviation amount is made using the blue color filter having lowvisibility, the possibility that the user notices an existence of thecolor filter which generates the difference can be suppressed.

Application Example 9

In the display device according to Application Example 7 or 8, it ispreferable that the light-emitting element and the color filter arearranged in the display region in a matrix shape, and positions in a rowdirection of the other color filters are different from each other inthe first column and the second column adjacent to the first column.

In this configuration, since the other color filters having a differentwidth do not make one column, the possibility that the user notices anexistence of the other color filter which generates the difference canbe suppressed.

Application Example 10

According to this application example, there is provided an electronicapparatus including a display device according to any one of ApplicationExamples 1 to 9.

In this configuration, both reducing the size of the electronicapparatus such as the head mounted display and improving a quality ofthe image displayed on the electronic apparatus can be realized at thesame time.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a diagram illustrating an outline of an electronic apparatusaccording to an embodiment.

FIG. 2 is a diagram illustrating an inner structure of the electronicapparatus according to the embodiment.

FIG. 3 is a diagram illustrating an optical system of the electronicapparatus according to the embodiment.

FIG. 4 is a diagram illustrating a display device according to theembodiment.

FIG. 5 is a diagram illustrating a display device according toComparative Example.

FIG. 6A is a diagram illustrating a configuration of a sub-areaboundary.

FIG. 6B is a diagram illustrating the configuration of the sub-areaboundary.

FIG. 7 is a diagram illustrating an arrangement of a sub-area boundary.

FIG. 8 is a diagram illustrating a relationship between a deviationamount and an angle of view.

FIG. 9A is a diagram illustrating a configuration of a sub-area boundaryof a display device according to another embodiment.

FIG. 9B is a diagram illustrating the configuration of the sub-areaboundary of the display device according to another embodiment.

FIG. 10 a diagram illustrating an arrangement of a sub-area boundary ofa display device according to Modification Example 1.

FIG. 11 a diagram illustrating an arrangement of a sub-area boundary ofa display device according to Modification Example 2.

DESCRIPTION OF EMBODIMENTS

Hereinafter, an embodiment of the invention will be described usingdrawings. In addition, in drawings hereinbelow, since each layer or eachmember is illustrated at a size of a recognizable degree on thedrawings, each layer or each member adopts a different scale of map.

Embodiment 1

(Outline of Electronic Apparatus)

FIG. 1 is a diagram illustrating an outline of an electronic apparatusaccording to Embodiment 1. First, the outline of the electronicapparatus will be described with reference to FIG. 1.

The head mounted display 100 is an example of the electronic apparatusaccording to the embodiment and includes the display device 80 (refer toFIG. 3). As illustrated in FIG. 1, an exterior of the head mounteddisplay 100 has a glasses-like shape. A user wearing the head mounteddisplay 100 visually recognizes a video light GL to be an image (referto FIG. 3), and the user visually recognizes the external light by asee-through manner. In short, the head mounted display 100 has asee-through function which overlapping displays the external light andthe video light GL, a wide angle of view, a high performance, and issmall and lightweight.

The head mounted display 100 includes a transparent member 101 thatcovers a front of the user's eyes, a frame 102 that supports thetransparent member 101, and a first built-in device portion 105 a and asecond built-in device portion 105 b that are attached to a part fromcover portions of right end and left end of the frame 102 to a rearhanging portion (temple). The transparent member 101 is divided into afirst optical part 103 a and a second optical part 103 b which are anoptical member (transparent eye cover) curved at a thickness to coverthe front of the user's eyes. The first display device 151 combining thefirst optical part 103 a and the first built-in device portion 105 a onthe left side in FIG. 1 is a part displaying the see-through virtualimage for a right eye, and functions as the electronic apparatus whichhas the display function even in when used alone. In addition, thesecond display device 152 combining the second optical part 103 b andthe second built-in device portion 105 b on the right side in FIG. 1 isa part displaying the see-through virtual image for a left eye, andfunctions as the electronic apparatus which has the display functioneven in when used alone.

Inner Structure of Electronic Apparatus

FIG. 2 is a diagram illustrating an inner structure of the electronicapparatus according to the embodiment. FIG. 3 is a diagram illustratingan optical system of the electronic apparatus according to theembodiment. Next, the inner structure and the optical system of theelectronic apparatus will be described with reference to FIG. 2 and FIG.3. In addition, in FIG. 2 and FIG. 3, the first display device 151 isdescribed as an example of the electronic apparatus; however, the seconddisplay device 152 also has symmetrically mostly the same structure asthe first display device 151.

As illustrated in FIG. 2, the first display device 151 includes aprojection transparent device 70 and a display device 80 (refer to FIG.3). The projection transparent device 70 includes a prism 10 which is alight guiding member, a light transmission member 50, and a projectionlens 30 for image forming (refer to FIG. 3). The prism 10 and the lighttransmission member 50 are integral with each other by bonding, forexample, an upper surface 10 e of the prism 10 and a lower surface 61 eof the frame 61 comes into contact with each other so as to be tightlyfixed to a bottom of the frame 61. The projection lens 30 is fixed to anend of the prism 10 through a lens tube 62 storing the projection lens.The prism 10 and the light transmission member 50 in the projectiontransparent device 70 correspond to a first optical part 103 a in FIG.1, and the projection lens 30 in the projection transparent device 70and a display device 80 correspond to a first built-in device portion105 a in FIG. 1.

In the projection transparent device 70, the prism 10 is a circular arcshape member which is curved along the face in plane view, and can bedivided into a first prism part 11 in center side near a nose and asecond prism part 12 in peripheral side far from the nose. The firstprism part 11 is arranged on a light emitting side, and as a sidesurface having an optical function, includes a first surface S11 (referto FIG. 3), a second surface S12, and a third surface S13. The secondprism part 12 is arranged on a light incidence side, and as a sidesurface having an optical function, includes a fourth surface S14 (referto FIG. 3) and a fifth surface S15. Among these, the first surface S11and the fourth surface S14 are adjacent to each other, and the thirdsurface S13 and the fifth surface S15 are adjacent to each other. Thesecond surface S12 is arranged between the first surface S11 and thethird surface S13. The prism 10 includes the upper surface 10 e adjacentto from the first surface S11 to the fourth surface S14.

The prism 10 is made of a resin material having high transmittance in avisible region, for example, is formed by injecting and solidifying athermoplastic resin in a mold. A main body part 10 s of the prism 10(refer to FIG. 3) is known as an integral forming component; however,the main body part 10 s can be divided into a first prism part 11 and asecond prism part 12. The first prism part 11 is capable of guiding andemitting the video light GL and transmitting an external light. Thesecond prism part 12 is capable of making the video light GL be incidentand guiding the video light GL.

The light transmission member 50 is integrally fixed to the prism 10.The light transmission member 50 is a member which supports atransmission function of the prism 10 (auxiliary prism). The lighttransmission member 50 is made of a resin material having hightransmittance in a visible region and having the substantially the samerefractive index as that of the main body part 10 s of the prism 10. Thelight transmission member 50, for example, is made by forming thethermoplastic resin.

As illustrated in FIG. 3, the projection lens 30 includes three the lens31, 32, and 33 along an optical axis in an incidence side. Each lens 31,32, and 33 is a lens which is a rotationally symmetrical to a centralaxis of light incidence surface of the lens, and at least one of thelenses is an aspheric lens. The projection lens 30 inputs the videolight GL which is emitted from a display device 80 to the inside of theprism 10 so as to reimage the video light GL to an eye EY. In short, theprojection lens 30 is a relay optical system for reimaging the videolight GL which is emitted from each pixel 820 of the display device 80to the eye EY through the prism 10. The projection lens 30 is held inthe lens tube 62, and the display device 80 is fixed to an end of thelens tube 62. The second prism part 12 of the prism 10 is connected tothe lens tube 62 holding the projection lens 30, and indirectly supportsthe projection lens 30 and the display device 80.

The pixel 820 is arranged in the display device 80 in an M column and Nrow matrix shape. M and N are integers of two or greater, for example,M=720, N=1280 in the embodiment. Each pixel 820 includes p sub-pixel(s),and each sub-pixel includes a light-emitting element 830 and a colorfilter 840 through which the light emitted from the light-emittingelement 830 passes. The light-emitting element 830 emits white light,and for example, an organic EL element is used in the embodiment. As thelight-emitting element 830, other LED element, a semiconductive laserelement, or the like can be used. In the embodiment, p is 3, and eachpixel 820 includes three light-emitting elements 830 and three colorfilters 840. In the color filter 840 of each pixel 820, a red colorfilter 840R, a green color filter 840G, and a blue color filter 840B areincluded, and converts the light from the corresponding light-emittingelement 830 to red light, green light, or blue light, so as to be thevideo light GL. In addition to this, as p=4, in the color filter 840,the color filter 840 for white light (actually, sub-pixel which does notexist in color filter 840) may be prepared, or the color filter 840 foryellow light may be prepared.

As illustrated in FIG. 3, an optical axis of the video light GL emittedfrom each pixel 820 (exactly, each sub-pixel) is deviated in every pixel820 (exactly, in every sub-pixel). The display device 80 of theembodiment is capable of making the user recognize the image which isbright and has high resolution by correcting such a deviation. Next,this point will be described.

Configuration of Display Device

FIG. 4 is a diagram illustrating the display device according to theembodiment, Part (a) of FIG. 4 is a cross-sectional diagram of theentirety, Part (b) of FIG. 4 is a plane diagram of a pixel, and Part (c)of FIG. 4 is a cross-sectional diagram of the pixel. Parts (aL) to (bR)of FIG. 5 are diagrams illustrating the display device according to acomparative example, Parts (aL) to (aR) of FIG. 5 are plane diagrams ofthe pixel, and Parts (bL) to (bR) of FIG. 5 are cross-sectional diagramsof the pixel. Next, referring to Parts (a) to (bR) of FIG. 4, thedisplay device of the embodiment will be described. In addition, Parts(aL) to (bR) of FIG. 5 are diagrams illustrating a comparative example;however, for the sake of easy understanding, parts illustrating the samefunctions as that of the display device of the embodiment will be giventhe same terms and numerals. Also, in the drawings hereinbelow, for thesake of easy understanding, an orthogonal coordinate system of x, y, andz is adopted. A z axis is an axis along a normal line of the displaydevice, a y axis is an axis in which the pixels 820 are arranged side byside in a vertical direction of M column in the display device (axisalong an longitudinal direction of rows), and an x axis is an axis inwhich the pixels 820 are arranged side by side in a horizontal directionof N row in the display device (axis along an longitudinal direction ofcolumns). In the drawings hereinbelow, for the sake of easyunderstanding, an arbitrary reduced scale is adopted, and a differentreduced scale is used for each component even in one drawing.

As illustrated in Part (a) of FIG. 4, the display device 80 includes thedisplay region 810. The optical axis of the video light GL from thepixel 820 in a center portion C of the display region is almost alongthe normal line of the display device; however, the optical axis of thevideo light GL from the pixel 820 in a left part L of the display region810 is inclined to the right side of the normal line of the displaydevice. In the same manner, the optical axis of the video light GL fromthe pixel 820 in a right part R of the display device is inclined to theleft side of the normal line of the display device. In the displaydevice 80 of an electronic apparatus including a light collectionoptical system such as a head mounted display 100 as described above,except the center portion of the display region 810, the optical axisfrom the light-emitting element 830 is inclined to the center of thedisplay region 810. In the display device 80 of the embodiment, thedisplay region 810 is divided into 2q+1 sub-area. In the pixel 820included in the other sub-area, a relative positional relationshipbetween the center of the light-emitting element 830 and the center ofthe color filter 840 is different. In addition, q is an integer of oneor greater, and q is 20 in the embodiment. That is, the display region810 is divided into a first sub-area including the center portion Cthereof, 20 sub-areas which are divided in a right direction along the xaxis from the first sub-area, and 20 sub-areas which are divided in aleft direction along the x axis from the first sub-area, that is, total41 sub-areas. In other words, there are 2q+1 types of arrangement havinga different relative positional relationship between the center of thelight-emitting element 830 in the display region 810 and the center ofthe color filter 840.

Part (bL) of FIG. 4 is a plane diagram of the pixel 820 which ispositioned on the left side further than the center portion C of thedisplay region 810, Part (bC) of FIG. 4 is a plane diagram of the pixel820 which is positioned on the center portion C of the display region810, and Part (bR) of FIG. 4 is a plane diagram of the pixel 820 whichis positioned on the right side further than the center portion C of thedisplay region 810. Part (cL) of FIG. 4 is a cross-sectional diagram ofthe pixel 820 which is positioned on the left side further than thecenter portion C of the display region 810, Part (cC) of FIG. 4 is across-sectional diagram of the pixel 820 which is positioned on thecenter portion C of the display region 810, and Part (cR) of FIG. 4 is across-sectional diagram of the pixel 820 which is positioned on theright side further than the center portion C of the display region 810.The display device 80 according to the embodiment includes a firstlight-emitting element 830 and the first color filter 840 through whichlight from the first light-emitting element 830 passes. For example, theabove described element and filter are included in the pixel 820 whichis positioned on the left side further than the center portion Cillustrated in Part (bL) of FIG. 4 or Part (cL) of FIG. 4, or in thepixel 820 which is positioned on the right side further than the centerportion C, illustrated in Part (bR) of FIG. 4 or Part (cR) of FIG. 4. Inaddition, the display device 80 includes a second light-emitting element830 and a second color filter 840 through which light from the secondlight-emitting element 830 passes. For example, the above describedfilter and element are included in the pixel 820 which is positioned onthe center portion C, illustrated in Part (bC) of FIG. 4 or Part (cC) ofFIG. 4. Accordingly, for example, the second light-emitting element 830and the second color filter 840 included in the pixel 820 which ispositioned near the center portion C of the display region 810 arearranged inside further than the first light-emitting element 830 andthe first color filter 840 in the display region 810.

As illustrated in FIG. 4, the relative positional relationship betweenthe center of the first light-emitting element 830 and the center of thefirst color filter 840 in a plan diagram is different from the relativepositional relationship between the center of the second light-emittingelement 830 and the center of the second color filter 840 in a plandiagram. Next, as illustrated in Part (cL) of FIG. 4 or Part (cR) ofFIG. 4, the optical axis of the first light-emitting element 830 isinclined to the center side of the display region 810 from the normalline with respect to the first light-emitting element 830, and thecenter of the first color filter 840 in plane view is deviated to thecenter side of the display region 810 more than the center of the firstlight-emitting element 830 in plane view.

When a deviation amount between the center of the first light-emittingelement 830 and the center of the first color filter 840 in plane viewis a first deviation amount, and a deviation amount between the centerof the second light-emitting element 830 and the center of the secondcolor filter 840 in plane view is a second deviation amount, the seconddeviation amount is smaller than the first deviation amount. As anexample, in the pixel 820 positioned on the center portion C illustratedin Part (bC) of FIG. 4 or Part (cC) of FIG. 4, the second deviationamount is zero, and the center of the second light-emitting element 830is almost integral with the center of the second color filter 840. Incontrast, in the pixel 820 positioned on the left side further than thecenter portion C illustrated in Part (bL) of FIG. 4 or Part (cL) of FIG.4, or in the pixel 820 positioned on the right side further than thecenter portion C illustrated in Part (bR) of FIG. 4 or Part (cR) of FIG.4, the first deviation amount is a finite positive value, and the seconddeviation amount is smaller than the first deviation amount.

In short, in every sub-area, the color filter 840 is arranged along theoptical axis of the light-emitting element 830. In addition, accordingto a deviation from the center portion C of the display region 810, thecolor filter 840 is arranged so as to be greatly deviated to the centerportion of the display region 810 with respect to the light-emittingelement 830. In the display device 80 of the electronic apparatusincluding the light collection optical system, the inclination of theoptical axis from the light-emitting element 830 in the outside of thedisplay region 810 increases; however, in the display device 80, thedeviation amount of the light-emitting element 830 and the color filter840 is adjusted according to the position of the light-emitting element830 in the display region 810.

As a result with such a configuration, while maintaining a size of thelight-emitting element 830 at certain degree, the angle of view can bewidened. In addition, the angle of view is an angle thetac that theoptical axis of the pixel 820 forms with the normal line of the displaydevice (refer to FIG. 8). This point will be described compared with acomparative example. As illustrated in FIG. 5, in the display device ofthe related art, the positional relationship between the light-emittingelement 830 and the color filter 840 is the same in the entire displayregion 810. That is, the center of the light-emitting element 830 andthe center of the color filter 840 are integral with each other in anypixel 820 of the display region 810. Accordingly, when promotingenhancement resolution, the angle of view outside the display region 810becomes large, and thus, the light-emitting element 830 needs to besmall. For this reason, the video light GL is weak, and displayed dark.That is, in the related art, enhancing resolution and bright display arenot both performed at the same time. In contrast, in the display deviceof the embodiment, even when the enhancement of resolution is promotedand the angle of view outside of the display region 810 becomes large, asize of the light-emitting element 830 can be maintained at certaindegree and the video light GL can be maintained strongly. In otherwords, in the display device according to the embodiment, both theenhancing resolution and the bright display are realized at the sametime so that both reducing the size of the electronic apparatus such asthe head mounted display 100 including the light collection opticalsystem and forming a high quality image displayed on the electronicapparatus are realized at the same time. As an example, when a length ofa row direction of the sub-pixel is 7.5 micrometers, a width of a columndirection of the sub-pixel is 2.5 micrometers, and a length of a rowdirection of the light-emitting element 830 is 6.1 micrometers, a widthof a row direction of the light-emitting element 830 of the comparativeexample is 1.1 micrometers, but a width of a row direction of thelight-emitting element 830 of the embodiment is 1.8 micrometers. Thatis, since an area of the light-emitting element 830 of the embodimentcan be 1.64 times an area of the light-emitting element 830 of thecomparative example, it is possible to reduce driving voltage or todisplay brightly.

Sub Area Boundary

FIGS. 6A and 6B are diagrams illustrating a configuration of a sub-areaboundary. FIG. 6A is a plane diagram of the pixel near the sub-areaboundary and FIG. 6B is a cross-sectional diagram of the pixel near thesub-area boundary. FIG. 7 is a diagram illustrating an arrangement ofthe sub-area boundary. Next, referring to FIG. 6A to FIG. 7, theconfiguration and the arrangement of the sub-area boundary SB will bedescribed. In addition, the sub-area boundary SB is a boundary betweenone sub-area and the next sub-area.

The pixels 820 which are positioned in the one sub-area have the samepositional relationship between the light-emitting element 830 and thecolor filter 840 as each other. Meanwhile, the positional relationshipbetween the light-emitting element 830 and the color filter 840 isdifferent in each pixel 820 in a different sub-area as illustrated inFIGS. 6A and 6B. In an example of FIGS. 6A and 6B, in the pixel 820 ofthe left side of the sub-area boundary SB, the center of thelight-emitting element 830 is almost integral with the center of thecolor filter 840; however, in the pixel 820 of the right side, thecenter of the color filter 840 is deviated from the center of thelight-emitting element 830 toward the left side. Next, a configurationof the sub-area boundary SB will be described.

The display device 80 according to the embodiment includes theseparation portion 850 that separates the color filter 840. Theseparation portion 850 is a member that suppresses mixing a colormaterial of the color filter 840, or a bank when the color filter 840 isformed in a printing manner, or a so called black matrix for avoidingthe mixing of the color. In an example of FIGS. 6A and 6B, a deviationamount of the center of the first light-emitting element 830 in theright sub-area and the center of the first color filter 840 is a firstdeviation amount, and a deviation amount of the center of the secondlight-emitting element 830 and the center of the second color filter 840is a second deviation amount. As described above, the second deviationamount is smaller than the first deviation amount; however, a differencebetween the first deviation amount and the second deviation amount ismade by the width of the separation portion 850 arranged between thefirst color filter 840 and the second color filter 840. The separationportion 850 that divides the sub-pixels positioned in one sub-area isconstant at a standard width W_(BS). In contrast, even when the adjacentsub-pixels are in a different sub-area, the separation portion 850 has achanging width W_(BC). The standard width W_(BS) and the changing widthW_(BC) are different from each other, and in the embodiment, thechanging width W_(BC) is narrower than the standard width W_(BS). Asdescribed above, the positional relationship between the light-emittingelement 830 and the color filter 840 can be easily adjusted by changingonly a width of the separation portion 850 of the sub-area boundary SB.

In addition, in order to suppress the possibility that the user noticesan existence of the separation portion 850, a difference between thefirst deviation amount and the second deviation amount is made bychanging the width of the separation portion 850 which is arrangedbetween the first color filter 840 and the second color filter 840 andseparates the red color filter 840R and the blue color filter 840B.Since humans have high visibility with respect to a green color, whenthe difference of the deviation amount is made by avoiding the greencolor filter 840G having high visibility, it is not easy for the user tofind an existence of the separation portion 850 having the changingwidth W_(BC).

In the embodiment, N=1280 pixels 820 are arranged in parallel in thecolumn direction of the display region 810, and the display region 810is divided into 2q+1 (q=20) sub-areas. 40 rows of the pixel group 820positioned in the center portion C of the display region 810 constitutesthe central sub-area, and the deviation amount is set to zero. 40sub-areas other than the central sub-area are respectively configured tohave the 31 rows pixel group 820. The changing width W_(BC) is 0.025micrometers. Accordingly, the deviation amount increases 0.025micrometers when moving to next one from the central sub-area to theside sub-area, and the deviation amount of the outermost side sub-areabecomes 0.5 micrometers.

As illustrated in FIG. 7, the positions in a row direction of theseparation portions 850 (sub-area boundary) that generate a differencebetween the first deviation amount and the second deviation amount arepreferably different from each other in the first row and the second rowadjacent to the first row. Accordingly, since the separation portion 850(sub-area boundary SB) having a different width does not become onecolumn, a possibility that the user notices an existence of theseparation portion 850 which generates the difference can be suppressed.In the embodiment, 1 pixel 820 of the sub-area boundary SB is deviatedin every one row, and three rows make one period.

Deviation Amount

FIG. 8 is a diagram illustrating a relationship between the deviationamount and the angle of view. Next, with reference to FIG. 8, therelationship between the deviation amount and the angle of view will bedescribed.

The deviation amount of the light-emitting element 830 and the colorfilter 840 in each sub-area is determined according to where thesub-area is positioned in the display region 810 and how much is theangle of view from the sub-area. As illustrated in FIG. 8, a sealinglayer 860 is formed on the upper surface of the light-emitting element830, and the color filter 840 is formed on the upper surface of thesealing layer 860. A filling layer 870 is formed on the further uppersurface of the color filter 840, and is mainly made of an organicmaterial from the sealing layer 860 to the filling layer 870. Arefractive index in these three layers is n_(A). The cover glass 880 isarranged on the upper surface of the filling layer 870, and a quartzglass is used in the embodiment. A refractive index of the cover glass880 is n_(B). The upper surface of the cover glass 880 is air 890, and arefractive index of the air 890 is n_(C). Further, an emitting angle(tilt angle from the normal line of the display device 80) of the videolight GL from the light-emitting element 830 is theta_(A), and theemitting angle (tilt angle from the normal line of the display device80) of the video light GL from the filling layer 870 to the cover glass880 is theta_(B), and the angle of view (tilt angle from the normal lineof the display device 80) of the video light GL from the cover glass 880to the air 890 is theta_(C). A rule of refraction at this time isexpressed by Equation 1.

$\begin{matrix}{\lbrack {{Math}.\mspace{14mu} 1} \rbrack\mspace{644mu}} & \; \\{{\frac{\sin\;\vartheta_{A}}{\sin\;\vartheta_{B}} = \frac{n_{B}}{n_{A}}},{\frac{\sin\;\vartheta_{B}}{\sin\;\vartheta_{C}} = \frac{n_{C}}{n_{B}}},{{\sin\;\vartheta_{C}} = {\frac{n_{A}}{n_{C}}\sin\;\vartheta_{A}}}} & (1)\end{matrix}$

Meanwhile, a deviation amount of the color filter 840 with respect tothe light-emitting element 830 is L(x), a distance from the uppersurface of the light-emitting element 830 to the upper surface of thecolor filter 840 is Z₀, and a relationship between L(x), Z₀, andtheta_(A) are expressed by Equation 2.

$\begin{matrix}{\lbrack {{Math}.\mspace{14mu} 2} \rbrack\mspace{644mu}} & \; \\{{\tan\;\vartheta_{A}} - \frac{L\;(x)}{Z_{0}}} & (2)\end{matrix}$

The relationship between the angle of view theta_(C) and the deviationamount L(x) by Equation 1 and Equation 2 is expressed by to Equation 3.

$\begin{matrix}{\lbrack {{Math}.\mspace{14mu} 3} \rbrack\mspace{644mu}} & \; \\{{L\;(x)} = {{Z_{0}\tan\;\vartheta_{A}} = {{Z_{0}{\tan( {\arcsin\lbrack {\frac{n_{C}}{n_{A}}\sin\;\vartheta_{C}} \rbrack} )}} = {Z_{0} \cdot \frac{\frac{n_{C}}{n_{A}}\sin\;\vartheta_{C}}{\sqrt{1 - ( {\frac{n_{C}}{n_{A}}\sin\;\vartheta_{C}} )^{2}}}}}}} & (3)\end{matrix}$

It is ideal that a relationship by Equation 3 is generally satisfied ineach sub-area. In the embodiment, Equation 3 is satisfied in theoutermost sub-area. Specifically, n_(A)=1.80, n_(B)=1.48, n_(C)=1.00,theta_(A)=6.0 degrees, theta_(B)=7.3 degrees, theta_(C)=10.8 degrees,and L (x=4.68357 mm, the outermost sub-area)=0.5 micrometers. As aresult, the angle of view from the outermost sub-area is almost integralwith an optical axis of the lens 33 in designing.

Embodiment 2 Embodiment Having Modified Sub-Area Boundary

FIGS. 9A and 9B are diagrams illustrating a configuration of thesub-area boundary of the display device according to embodiment 2. FIG.9A is a plane diagram of the pixel near the sub-area boundary, and FIG.9B is a cross-sectional diagram of the pixel near the sub-area boundary.Hereinafter, referring to FIGS. 9A and 9B, the display device 80according to embodiment 2 will be described. In addition, the sameconfiguration parts will be given the same sign and numeral of that ofEmbodiment 1, and a repeated description will be omitted.

The embodiment (FIGS. 9A and 9B) has a different configuration of thesub-area boundary SB compared to Embodiment 1 (FIGS. 6A and 6B). Exceptthe configuration, the others are almost the same as that ofEmbodiment 1. In Embodiment 1 (FIGS. 6A and 6B), the sub-area boundarySB is formed by changing a width of the separation portion 850. Incontrast, as illustrated in FIGS. 9A and 9B, in the embodiment, thewidth of the separation portion 850 are the same as each other, but itis different in that the sub-area boundary SB is formed by changing awidth of the color filter 840. Except for that, the other configurationsare the same as that of Embodiment 1.

In the example of FIGS. 9A and 9B, a deviation amount between the centerof the first light-emitting element 830 and the center of the firstcolor filter 840 on the right side sub-area is a first deviation amount,and a deviation amount between the center of the second light-emittingelement 830 and the center of the second color filter 840 on the leftside sub-area is a second deviation amount. As described above, thesecond deviation amount is smaller than the first deviation amount;however, a difference between the first deviation amount and the seconddeviation amount is made by a width of another color filter 840 arrangedbetween the first color filter 840 and the second color filter 840. Thecolor filter 840 of the sub-pixel positioned inside of one sub-area isconstant except sub-pixels of one column in the outermost end of thesub-area (sub-pixel including the other color filter 840). For example,in the right sub-area of FIGS. 9A and 9B, the standard width W_(CFRS) ofthe red color filter 840R is the same as the standard width W_(CFGS) ofthe green color filter 840G. Meanwhile, in the blue color filter 840B,the changing width W_(CFBC) of one column blue color filter 840B whichforms the sub-area boundary SB is different from the standard widthW_(CFBS) of other blue color filter 840B. The standard width W_(CFBS) ofthe blue color filter 840B is the same as the standard width W_(CFBS) ofthe red color filter 840R and the standard width W_(CFGS) of the colorfilter 840G. In the embodiment, the changing width W_(CFBC) of onecolumn blue color filter 840B which forms the sub-area boundary SB isnarrower than the standard width W_(CFGS) of the red color filter 840Ror the standard width W_(CFGS) of the green color filter 840G, or thestandard width W_(CFBS) of the blue color filter 840B. As describedabove, the positional relationship between the light-emitting element830 and the color filter 840 can be easily adjusted by changing only thewidth of the color filter 840 which forms the sub-area boundary.

Further, in order to suppress a possibility that the user notices anexistence of the color filter 840 which generates the difference, it ispreferable that the difference between the first deviation amount andthe second deviation amount is made by the blue color filter 840Barranged between the first color filter 840 and the second color filter840. Since the human has low visibility with respect to a blue color,when the difference of the deviation amount is made using the blue colorfilter 840B having low visibility, the possibility that the user noticesan existence of the first color filter 840 which generates thedifference can be suppressed. With such a configuration, the same effectas that of Embodiment 1 can be obtained.

In addition, the invention is not limited to the embodiment describedabove, and can adopt various changes and improvements of the abovedescribed embodiment. The Modification Example will be describedhereinbelow.

Modification Example 1

(Embodiment having Different Arrangement of the Sub-area Boundary 1)

FIG. 10 is a diagram illustrating an arrangement of the sub-areaboundary SB of the display device according to Modification Example 1.In Embodiment 1 (FIG. 7), three rows of the sub-area boundaries SB makeone period. With respect that, in the modification example, the periodof the sub-area boundary SB is made by two rows as illustrated in FIG.10. In addition to this, the period of the sub-area boundary SB may bemade by four rows or any number of rows. In addition, the period of thesub-area boundary SB may arbitrary arranged in every row. In this case,an average value in every row may correspond to a position of thesub-area boundary SB described in Embodiment 1.

Modification Example 2

(Embodiment Having Different Arrangement of the Sub-Area Boundary 2)

FIG. 11 is a diagram illustrating an arrangement of the sub-areaboundary of the display device according to Modification Example 2. InEmbodiment 1 (FIG. 7), three rows of the sub-area boundary SB make oneperiod. In contrast, in Modification Example, as illustrated in FIG. 11,the sub-area boundary SB is a straight line of one column. Theconfiguration as described above may be used.

REFERENCE SIGNS LIST

-   -   C center portion    -   SB sub-area boundary    -   S11 first surface    -   S12 second surface    -   S13 third surface    -   S14 fourth surface    -   S15 fifth surface    -   10 prism    -   10 e upper surface    -   10 s main body part    -   11 first prism part    -   12 second prism part    -   30 projection lens    -   31 lens    -   32 lens    -   33 lens    -   50 light transmission member    -   61 frame    -   61 e lower surface    -   62 lens tube    -   70 projection transparent device    -   80 display device    -   100 head mounted display    -   101 transparent member    -   102 frame    -   103 a first optical part    -   103 b second optical part    -   105 a first built-in device portion    -   105 b second built-in device portion    -   151 first display device    -   152 second display device    -   810 display region    -   820 pixel    -   830 light-emitting element    -   840 color filter    -   840B blue color filter    -   840R red color filter    -   840G green color filter    -   850 separation portion    -   860 sealing layer    -   870 filling layer    -   880 cover glass    -   890 air

The invention claimed is:
 1. A display device comprising: a first pixelhaving a first light-emitting element and a first color filter throughwhich light from the first light-emitting element passes; and a secondpixel having a second light-emitting element and a second color filterthrough which the light from the second light-emitting element passes,wherein a relative positional relationship between a center of the firstlight-emitting element and a center of the first color filter in planeview is different from a relative positional relationship between acenter of the second light-emitting element and a center of the secondcolor filter in plane view, an optical axis of a first video light fromthe first pixel is set by the relative positional relationship betweenthe center of the first light-emitting element and the center of thefirst color filter in plane view, and an optical axis of a second videolight from the second pixel is set by the relative positionalrelationship between the center of the second light-emitting element andthe center of the second color filter in plane view.
 2. The displaydevice according to claim 1, wherein the first light-emitting element,the first color filter, the second light-emitting element, and thesecond color filter are arranged in a display region, an optical axis ofthe first light-emitting element is inclined to a center side of thedisplay region from a normal line with respect to the firstlight-emitting element, and the center of the first color filter inplane view is deviated to the center side of the display region furtherthan the center of the first light-emitting element in plane view. 3.The display device according to claim 2, wherein the secondlight-emitting element and the second color filter are arranged insidefurther than the first light-emitting element and the first color filterin the display region, and when a deviation amount of the center of thefirst light-emitting element and the center of the first color filter inplane view is a first deviation amount, and a deviation amount of thecenter of the second light-emitting element and the center of the secondcolor filter in plane view is a second deviation amount, the seconddeviation amount is smaller than the first deviation amount.
 4. Thedisplay device according to claim 3, further comprising: a separationportion that separates the first color filter and the second colorfilter, wherein a difference between the first deviation amount and thesecond deviation amount is made by a width of the separation portion. 5.The display device according to claim 3, wherein the first and secondcolor filters each include a red color filter, a green color filter, anda blue color filter, and the difference between the first deviationamount and the second deviation amount is made by a width of aseparation portion which is arranged between the first color filter andthe second color filter and separates the red color filter of the firstcolor filter and the blue color filter of the second color filter. 6.The display device according to claim 4, wherein a plurality of colorfilters, including the first and second color filters, is arranged inthe display region in a matrix having a first row and a second rowadjacent to the first row, at least one of the separation portion isarranged in each of the first row and the second row, between colorfilters, and a position in a row direction of the at least oneseparation portion in the first row is different from a position in therow direction of the at least one separation portion in the second row.7. The display device according to claim 3, wherein the differencebetween the first deviation amount and the second deviation amount ismade by a width of another color filter arranged between the first colorfilter and the second color filter.
 8. The display device according toclaim 7, wherein the first color filter and second color filter eachinclude a red color filter, a green color filter, and a blue colorfilter, and the other color filter is the blue color filter of thesecond color filter.
 9. The display device according to claim 7, whereina plurality of color filters, including the first and second colorfilters, is arranged in the display region in a matrix having a firstrow and a second row adjacent to the first row, at least one of theother color filter, which sets a difference between deviation amounts ofcolor filters and light-emitting elements, is arranged in each of thefirst row and the second row; and a position in a row direction of theat least one other color filter in the first row is different from aposition in the row direction of the at least one other color filter inthe second row.
 10. An electronic apparatus comprising: the displaydevice according to claim 1.